2011-03-11 Search for β+/EC double beta decay of 120Te
Search for β+/EC double beta decay of Te-120
We present a search for β+/EC double beta decay of 120Te performed with the CUORICINO experiment, an array of TeO2 cryogenic bolometers. After collecting 0.0573 kg·y of 120Te, we see no evidence of a signal and therefore set the following limits on the half-life: T0ν1/2 > 1.9 × 1021 yr at 90% C.L. for the 0ν mode and T2ν1/2 > 7.6 × 1019 yr at 90% C.L. for the 2ν mode. These results improve the existing limits by almost three orders of magnitude (four in the case of 0ν mode).